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It's Catalyst system efficiency below threshold
Trouble code P0420 means:Catalyst system efficiency below threshold
PO420 Catalyst System Efficiency Below Threshold. I believe it is catalyst system efficiency below threshold, bank 1. That is one option. Toyota had a problem with the ECM (Engine Control Module) giving this false code and manufactured a new ECM to eliminate this problem (ie. old part number 89661-0861 to new part number 89661-08062).
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
This code is generic and is the same on all vehicles. P0420 = Catalyst System Efficiency Below ThresholdCatalyst System Efficiency Below Threshold. This means that the secondary O2 sensor detects that the catalytic converter isn't working as efficiently as it should. This engine code can be triggered by any one of the following: 1.) The catalyst in the catalytic converter is cracked, clogged, or otherwise damaged. 2.) The secondary O2 sensor is malfunctioning. 3.) There is an exhaust leak. 4.) The computer unit is faulty
The airbag module on an 04 Toyota Sienna is located at the front of the engine compartment. It monitors for impacts which cross a threshold which triggers the airbags.
Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0420 means:Catalyst system efficiency below threshold
where is the classis location for toyota sienna
toyota sienna 2001
This code is generic and is the same on all vehicles. P0420 = Catalyst System Efficiency Below ThresholdCatalyst System Efficiency Below Threshold. This means that the secondary O2 sensor detects that the catalytic converter isn't working as efficiently as it should. This engine code can be triggered by any one of the following: 1.) The catalyst in the catalytic converter is cracked, clogged, or otherwise damaged. 2.) The secondary O2 sensor is malfunctioning. 3.) There is an exhaust leak. 4.) The computer unit is faulty